1 IAD N-[1h-indol-3-yl-acetyl]aspartic acid 1.000 2 IAV N-[1h-indol-3-yl-acetyl]valine acid 0.864 3 A1LWG (2~{R})-2-[2-(1~{H}-indol-3-yl)ethylamino]propanoic acid 0.810 4 IAG N-[1h-indol-3-yl-acetyl]glycine acid 0.810 5 GIC N-(2-aminoethyl)-N-(1h-indol-3-ylacetyl)glycine 0.708